Improvement in vehicle-springs



E. ,T. WESTERFIELD. Vehicle Spring.

- Patented Dc. 25, 1877.

INVENTOR:

ATTORNEYS.

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UNITED STATES PATENT OFFICE.

EUGENE T. WESTERFIELD, OF NEW YORK, N. Y.

IMPROVEMENT IN VEHICLE-SPRINGS.

Specification forming part of Letters Patent No. 198,717, dated December 25, 1877,- application filed September 1, 1877.

To all whom it may concern.- I that is pivoted to the axle of the vehicle Be it known that I, EUGENE T. WESTER- near thepointof attachment of the mainspring. FIELD, of New York city, in the county and The free end of the leverrod (1 passes through State of New York, have invented a new and a guide-ring, b, at the under side of the body, Improved Vehicle-Spring, of which the followthe spiral spring B being placed between the ing is a specification: shoulder a and the guide-ring b, so that when In the accompanying drawing, Figure 1 repthe load presses the body down the spiral resents a side elevation of my improved vespring is thrown into action at a certain point hicle-spring, and Fig. 2 a bottom view of the to re-enforce the mainspring. For light loads, same. themainspringmaybe sufficient; butiorheavy Similar letters of reference indicate correloads the spiral spring forms an auxiliaryto the sponding parts. mainspring, and takes up the surplus weight. The object of my invention is to furnish for The spiral spring may be made of any suitvehiclesof all kinds an improved compound able strength, according to the weight to be spring, the elasticity of which under light or sustained,whilethemainspringis madelighter, heavy burdens is equalized, and which is not andthereby cheaper, asless leaves are required. liable to break by a sudden jolt or jar. By The auxiliary spring is called into action the use of this spring the number of leaves in whenever the load exceeds a certain weight, the mainspring is lessened, and also the. cost the shoulder of the lever-rod compressing the of the same decreased, while it is not as liable spiral spring, and taking up thereby the addit to get out of order as the ordinary semi-elliptional weight. q tic or platform springs in general use. In this manner a cheaper and more effective Theinventionconsists of asemi-elliptic maincompound spring for vehicles of all kinds is spring, in combination with an auxiliary spiral 'urnished, that is not as liable to break as the spring, that is thrown into action by the presleaf-springs, and that will bear a heavier load ence of the load, and a connecting lever-rod, with greater facility than a mainspring of corworking by a shoulder on the spiral spring. responding power, and with a more uniform In the draWing,Arepresents themainspring, degree of elasticity.

made of semi-elliptic shape, and with. a suita- Having thus described my invention, what I ble number of leaves. The mainspring A is I claim as new, and desireto secure by Letfastened to the axle, the body of the vehicle ters Patent is I Y I resting on the mainspring. The mainspring Therod (1, pivoted to axle, sliding through isattached to the body of vehicle at one end, body-ring b, having shoulder a, and provided and arranged to slide or play along a bottom with spiral spring B, as shown and described,

plate andcasing or clip at the other end, The in combination with the mainspring A, for the mainspring is made lighter, with a less numpurpose specified.

ber of leaves, than customary in this class of EUGENE T. WESTERFIELD. springs, and the decrease in power provided Witnesses: i for or equalized by an auxiliary spiral spring, W. WESTERFIELD,

B, which rests on a shoulder, a, of a lever-rod, PAUL GOEPEL. 

